Contribución al estudio de las normas de diferentes países para el cemento Portland. III.- Especificaciones físicas
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Materials Literature
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A picture of the early stage of graphitization of a carbon black has been obtained from an x-ray study of a Fine Thermal (FT) carbon black heated for two hours at 2300°C. Nearest neighbor pairs of layers take on the graphite relation independently, producing both ABA and ABC sequences. There are two nearest neighbor l…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChelate Complexes of 1,10-Phenanthroline and Related Compounds.Warren W. Brandt, Francis P. Dwyer, and Eleanora D. GyarfasCite this: Chem. Rev. 1954, 54, 6, 959–1017Publication Date (Print):December 1, 1954Publication History Published online1 May 2002Published inissue 1 Dec…
The consequences are analyzed of the following two assumptions: (1) the effect of temperature upon magnetic anisotropy arises solely from the introduction of local deviations in the direction of magnetization; and (2) the local deviation in an elementary region is the resultant of a very large number of independent de…
Summary The mesomorphic or “liquid crystalline” neat and middle phases encountered in aqueous systems of soaps and synthetic detergents differ considerably in plasticity. Nevertheless, in fundamental phase studies or the examination of commercial products and processes, identification of these two phases has hitherto…
An equation for the activation energy of ionic conduction in silica glasses is developed. The approach uses the classical ideas of ionic crystal theory and elasticity theory. The equation finally derived involves the radius and valence of the modifier ion, the lattice constant of the glass, the electronic charge, the…
Abstract The infra-red spectrum of several synthetic polypeptides with small side chains (polymers of glycine and alanine) have been examined in the region 800 to 1700 cm-1. The observations include measurements with polarized radiation on the α (folded) and β (extended) forms of poly-L-alanine; deductions from these…
Abstract Single-crystal test specimens of van Arkel titanium were obtained by a modification of the strain anneal technique.The modes of slip have been identified as (101̄0) [112̄0],(101̄1) [112̄0], and (0001) [112̄0]. It has been shown that not only does the interstitial impurity affect the magnitude of the critical…
Fabric dust collectors are used industrially for the separation of dusts and fumes from air and gases in many manufacturing and material handling processes.As a class, these collectors are generally greater than 99% efficient by weight on dusts ranging from SO microns to the submicron sizes, when inlet dust loadings e…